JORDAHL® Anchor Channels are manufactured by Deutsche Kahneisen GmbH in Germany and are exclusively respresented in the United States by Decon® USA Inc. and in Canada by Continental Decon® Inc.
The history of connecting steel to concrete begins with an invention of Julius Kahn, member of a Chicago family of architects, whose "Kahn irons" opened up completely new possibilities for construction with reinforced concrete. In 1913 Anders Jordahl, a Norwegian engineer, who introduced Kahn's reinforcing technology in Germany, developed the Anchor Channel by designing a C-shaped profile which was used as reinforcement and connection device at the same time.
Today, with a century of experience in anchoring and connection technology “Deutsche Kahneisen Gmbh” with its brand name JORDAHL® has developed into an internationally renowned company and a leader of research in anchoring technology with a close relationship to its customers.
In 2009, Decon® joined in partnership with JORDAHL® to market and sell JORDAHL® Anchor Channels in North America. Decon® has 20 years experience as the innovator of the Decon® Studrails® and 50 years experience as a manufacturer of a full line of stud-weldable fasteners, including headed concrete anchors and shear connectors. JORDAHL® has over 100 years experience in anchoring technology. Together both companies offer many years of experience in providing well known quality products and technical support.
JORDAHL® Products – Quality made in Germany since 1907 and used in projects around the world
JORDAHL® Products are state of the art and help customers build efficiently to maintain quality standards
Strict quality control according to German and European approval requirements
ACI and Eurocode compatible design / reliable safety concept
Comprehensive range of superior anchoring & connection products with accessories
ISO 9001 based internal processes
Wherever construction is carried out, fully developed solutions in installation technology are needed for joining components to one another, for suspending loads or for connection devices. Irrespective of the product application, quality and safety are fundamental to the selection of a connection system. JORDAHL® Berlin and Decon® USA Inc. offer these services:
Creative support for planning and design
Customized solutions and project based consulting
Cost effective planning and support with engineering calculations
Excellent technical know-how by a team of experienced engineers
Reliable partner, focusing on a long-term customer relationship
Benefits of using Jordahl® Anchor Channels
JORDAHL® Anchor Channels are a superior connection system for transferring loads in reinforced and unreinforced concrete components.
Anchoring without damaging the concrete structure & reinforcement
Good integration into heavily reinforced components
Suitable for pre-stressed and post-tensioned structures
Increased load capacity near reinforcement
High load capacity for static and dynamic loads
Fatigue and blast load resistant
Time efficient on-site installation
Skilled labor not required for installation
Installation with simple tools like hammer and wrench
Small edge distances
Easy to customize
7+ load classes for most economical solutions
No Drilling • No Noise • No Dust • No Electrical Tools Required No Welding • No Risk of Fire • No Damage Caused by Sparks
Curtain Wall
Modern facade systems provide protection for occupants of office and apartment buildings, as well as the means for architects to create attractive buildings in the metropolitan skyline. Complete facade elements can be pre-configured in a factory and lifted with a crane into position. They can consist of glass, metal, concrete and natural stone elements. Even intelligent solar power and air conditioning systems can be integrated. The “unitized curtain wall systems” guarantee superior quality, safe working environment and fast-onsite installation. The outer loads are initially transferred to the JORDAHL® Anchor Channels with brackets and JORDAHL® T-bolts and then into the concrete structure.
Sheung Yee Road, Hong Kong, 2008
Benefits of using JORDAHL® Anchor Channels in Curtain Wall Applications
Safe installation even at high elevations
Safe working environment
Customized solution for the integration with various slab design concepts (e.g. thin composite decks, corners, etc.)
Low installation cost
Simple to install
Easy to adjust
Fast onsite installation
Concrete Precast Elements
Connecting Precast Elements by using JORDAHL® Anchor Channels and JORDAHL® T-bolts ensures optimal adjustment, flexibility and reliability. A wide variety of accessories are available to address unique applications:
Toothed straps
Angle plates
Restraint ties
Clamping plates
A pedestal wall connected to a support column using angle bracket with diagonal slot holes.
Industrial building quickly installed using large concrete components, Anchor Channels, T-bolts and brackets.
Structure of an industrial building completely preconfigured to be installed without any welding, drilling or cast in place concrete.
Corrugated Metal Sidings/Roofs
Corrugated metal siding installation channels allow fast, cost-effective installation of corrugated metal sidings or roofs on reinforced concrete components by the use of self-tapping screws. The hardened tip of the screw cuts the initial hole, allowing the thread to drill into the steel profile. Unlike all other Anchor Channels, the exposed surface of this Anchor Channel system does not have a slot opening. The foam stays inside to allow the tip of the screw to intrude. The corrugated metal siding installation channels from JORDAHL® can be incorporated easily in the existing reinforcement due to their slim anchor profile. The approved system of channels and self-tapping screws gives the precast industry a competitive advantage, due to quicker installation, which results in reduced cost.
Cross section of a JTB-AR channel profle with self-tapping screw holding a sheet metal roof.
JTB-UNI channel pre-installed in the rebar cage before pouring concrete.
Installation of a multi-layer insulated corrugated metal siding wall.
Brickwork Support
Creative design with masonry or exposed brickwork needs solutions, which are perfect in every detail. JORDAHL® offers the solutions that innovative architects need. A wide range of support brackets are available in Stainless Steel. With lateral restraints they will transfer loads into the concrete structure, no matter what height the building shall reach. The best solution for installation to a concrete structure is utilizing Anchor Channels during the design phase. On site the reward is a reliable, easy to use and quick connection.
Music Education Center Symfonia, Katowice, Poland, 2006
Railings
This is one of the most challenging applications for architects and designers. Frequently connection points between the handrail and concrete are forgotten or underestimated. The JORDAHL® JGB Anchor Channel system for railings and balustrades is a perfect solution, which offers long term and economical safety. JORDAHL® Anchor Channels offer a safe and engineered connection of railing posts to the front face of thin concrete slabs. This is possible due to the custom welded anchors made of reinforcement bars. Besides tensile and shear strength the JGB channels are also designed to take bending moments.
Mittelstandsmeile, Chemnitz, Germany, 2002
Stadium Seats
Seats in a sports stadium or arena require a heavy-duty connection method. The seat and the connection must be robust but also easy to remove, in case it needs to be moved to another location for different event or has to be replaced in case of damage. Continuous Anchor Channels with hook head T-bolts in solid concrete stages are the perfect solution.
"Safety first" is the basis for the design and construction of elevators. Therefore the reliability and the installation safety of JORDAHL® Anchor Channels make them the preferred connection method for the vertical guiderails. Repetitive loading due to non-symmetry and stresses induced by emergency brakes can be transferred securely into the concrete structure. Hot-rolled Anchor Channels are preferred because of the dynamic nature of the loading.
Adjustable bracket detail with a short Anchor Channel
Water Pipeline and other Projects
Water pipes have to cross rivers or streets. Many play an important role in the fresh water supply or waste water disposal network. The weight is substantial and frequently not constant but rather changing dynamically. Infrastructure bridges are logical means to help cross the barriers. However most of these bridges are pre-stressed or post-tensioned construction. Post-drill connections are a nuisance and they can even be dangerous, if a cable is hit.
JORDAHL® Anchor Channels are the right product to use: safe, quick and easy to connect anything, easy to reuse for new applications and flexible without risk of damaging the structure.
Installation - Efficient, Easy and Fast
JORDAHL® supplies Anchor Channels in all desired lengths. To avoid fresh concrete from flowing into the profile, JORDAHL® Anchor Channels are filled with either polystyrene (PS) or polyethylene (PE) foam. Both types can easily be removed.
Connecting
JORDAHL® Anchor Channels are installed according to the reinforcement / formwork drawings. To prevent displacement during concrete pouring, the channels are held in place:
in wooden formwork by nails through the nail holes in the back of the profile, or by lateral bonding with hot melt adhesives
in steel formwork by bonding with hot melt adhesives, or by bolting on with JORDAHL® T-bolts, or with magnets
in the surface of a concrete slab by wiring the anchors to reinforcement bars or, if required, by means of special spacers spot welded to the anchors.
Example of a Jordahl® Anchor Channel connected to wooden formwork.
Concrete is poured, raked and vibrated into the formwork - around the Anchor Channel concrete has to be compacted using appropriate means.
After the removal of the formwork the foam filler can be easily removed by means of a hammer or other tools.
JORDAHL® T-bolts can now be inserted to the Anchor Channel slot at any desired point and, following a 90° rotation, can be fixed by tightening with the appropriate torque. The slot in the bottom of the bolt must be transverse in relation to the channel direction.
Technical Information
Details JORDAHL® Anchor Channels are a connection system for transferring loads from steel to concrete components. The system consists of two or more steel anchors mechanically attached to a steel channel which holds a steel attaching bolt. A washer and hex nut are used to fix a steel connecting plate to the bolt. The available anchor channel profiles with their channel dimensions (width/height in mm) are shown below.
The type of channel material is signified by "K" for cold formed and "W" for hot rolled. The remaining dimensions and factored strengths are shown in the JORDAHL® Technical Brochure. The factored strengths are intended to be used with the Load and Resistance Factor Design (LRFD) method. Factored loads are compared to the factored strengths calculated in the technical brochure.
Additional factors related to specific project details must be applied to the strength values shown in the technical brochure. These additional factors include: edge and corner distance, member thickness, channel length and load position. All of these values affect the anchor channel strengths. JORDAHL® Anchor Channels come hot dipped galvanized and are also available in stainless steel.
K28/15
K38/17
W40/22
W50/30
W53/34
W55/42
W72/48
Design
The design of the JORDAHL® Anchor Channels follows ACI318-08 Appendix D with further information from "Anchorage in Concrete Construction" (Eligehausen, Mallee & Silva).
The design must consider the following failure modes in tension and shear:
Tension:
Steel failure
Concrete failure
Reinforcement steel and anchorage failure
Shear:
Steel failure
Concrete failure
Reinforcement steel and anchorage failure
Edge breakout with reinforcement
The weakest of these failure modes governs the Anchor Channel design. The design must also consider the interaction of tensile and shear forces. The T-bolt design is based on AISC.
Technical Support For techincal support please contact: Brian Hastings
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(800) 363-3266
